Sebastian Just is a senior engineering leader with 11 years of hands-on experience designing and delivering JVM-based systems across Finance, Energy and Media, now leading software engineering at Comcast. He combines deep Java and Scala expertise with architecture skills in OOD, functional programming, messaging and reactive streams, and a track record managing full lifecycle projects in both agile and classic settings. A pragmatic mentor and problem-solver, he has moved between coding, technical project leadership and second-line production support, reducing operational pain and accelerating delivery. His open-source contributions include dependency modernizations and improved testing for a popular Spring Data DynamoDB connector and robustness enhancements to a widely used CSV parser, signaling a focus on stability and practical tooling. Sebastian pairs technical depth with recent executive education in finance and an MS in Software Engineering, enabling him to align architecture decisions with business and risk considerations.
11 years of coding experience
9 years of employment as a software developer
Master of Science - MS, Software Engineering, Master of Science - MS, Software Engineering at Drexel University
Certificate, Leading with Finance, Certificate, Leading with Finance at HBX | Harvard Business School
Bachelor of Science (BS), Business Computer Science, Bachelor of Science (BS), Business Computer Science at Leibniz Akademie Hannover
Information Technology Specialist for Application Development, Information Technology Specialist for Application Development at RÖPERWEISE GmbH
Simplifies the development of creating an Amazon DynamoDB-based Java data access layer
Role in this project:
Back-end Developer
Contributions:297 commits, 11 PRs, 41 comments in 3 years 3 months
Contributions summary:Sebastian primarily worked on upgrading the project's dependencies, including Spring Boot and Spring Framework versions. Their contributions involved fixing unit tests and addressing issues related to the dependency upgrades, indicating a focus on ensuring the project's stability and compatibility. They also added integration tests with a local DynamoDB instance and implemented JDK8's Optional features, showcasing an interest in the project's testing and feature enhancement. Additional commits included creating examples for hash and range keys, as well as supporting Instant and Date types in the querying functionality.
Contributions:5 commits, 1 PR, 2 comments in 1 day
Contributions summary:Sebastian primarily contributed to the improvement of the CSV parsing library, focusing on enhancing error handling and feature additions. Their commits reveal involvement in implementing a `strictColumnHandling` option to emit "data-invalid" events for missing columns. Furthermore, the user addressed merge conflicts and made minor adjustments to documentation to ensure the library's usability. These contributions showcase a focus on improving the library's robustness and functionality.
csvcsv-readernodejsstreamcsv-parser
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Sebastian Just - Senior Manager Software Engineering at Comcast